<template>
  <div>
    <div class="editor" ref="editor" :style="styles"></div>
  </div>
</template>
<script>
import Quill from "quill";
import "quill/dist/quill.core.css";
import "quill/dist/quill.snow.css";
import "quill/dist/quill.bubble.css";
import Audio from "./audio";
import Video from "./video";
Quill.register(Audio, true);
Quill.register(Video, true);

const fileUploadUrl = "http://localhost:5000/file/upload";
// 文件远端地址
const fileRemoteUrl = "http://localhost:5000/";
export default {
  name: "Editor",
  props: {
    /* 编辑器的内容 */
    value: {
      type: String,
      default: "",
    },
    /* 高度 */
    height: {
      type: Number,
      default: null,
    },
    /* 最小高度 */
    minHeight: {
      type: Number,
      default: null,
    },
    /* 只读 */
    readOnly: {
      type: Boolean,
      default: false,
    },
    // 上传文件大小限制(MB)
    fileSize: {
      type: Number,
      default: 5,
    },
  },
  data() {
    return {
      Quill: null,
      currentValue: "",
      options: {
        theme: "snow",
        bounds: document.body,
        debug: "warn",
        modules: {
          // 工具栏配置
          toolbar: [
            // ["bold", "italic", "underline", "strike"], // 加粗 斜体 下划线 删除线
            // ["blockquote", "code-block"], // 引用  代码块
            // [{ list: "ordered" }, { list: "bullet" }], // 有序、无序列表
            // [{ indent: "-1" }, { indent: "+1" }], // 缩进
            // [{ size: ["small", false, "large", "huge"] }], // 字体大小
            // [{ header: [1, 2, 3, 4, 5, 6, false] }], // 标题
            // [{ color: [] }, { background: [] }], // 字体颜色、字体背景颜色
            // [{ align: [] }], // 对齐方式
            // ["clean"], // 清除文本格式
            ["link", "image", "video", "audio"],
          ],
        },
        placeholder: "请输入内容",
        readOnly: this.readOnly,
      },
    };
  },
  computed: {
    styles() {
      let style = {};
      if (this.minHeight) {
        style.minHeight = `${this.minHeight}px`;
      }
      if (this.height) {
        style.height = `${this.height}px`;
      }
      return style;
    },
    //   picture() {
    //     return sessionStorage.getItem("picture");
    // },
  },
  watch: {
    value: {
      handler(val) {
        if (val !== this.currentValue) {
          console.log(this.currentValue);
          this.currentValue = val === null ? "" : val;
          if (this.Quill) {
            this.Quill.pasteHTML(this.currentValue);
          }
        }
      },
      immediate: true,
    },
  },
  mounted() {
    this.init();
  },
  beforeDestroy() {
    this.Quill = null;
  },
  methods: {
    init() {
      const editor = this.$refs.editor;
      console.log(editor);
      this.Quill = new Quill(editor, this.options);
      //   range.index++;
      // 初始化内容
      this.Quill.pasteHTML(this.currentValue);
      // 将光标放置到最后
      this.Quill.setSelection(this.Quill.getSelection().index + 1);
      this.handleToolbarButtonsAddHandler();
      this.Quill.on("text-change", () => {
        const html = this.$refs.editor.children[0].innerHTML;
        const text = this.Quill.getText();
        const quill = this.Quill;
        this.currentValue = html;
        this.$emit("input", html);
        this.$emit("on-change", { html, text, quill });
        this.$emit("update:value", html);
      });
      this.Quill.on("text-change", (delta, oldDelta, source) => {
        this.$emit("on-text-change", delta, oldDelta, source);
      });
      this.Quill.on("selection-change", (range, oldRange, source) => {
        this.$emit("on-selection-change", range, oldRange, source);
      });
      this.Quill.on("editor-change", (eventName, ...args) => {
        this.$emit("on-editor-change", eventName, ...args);
      });
    },
    // 处理给工具栏按钮更换点击事件
    handleToolbarButtonsAddHandler() {
      let toolbar = this.Quill.getModule("toolbar");
      console.log(toolbar);
      toolbar.addHandler("image", (value) =>
        value ? this.handleFileClick("image") : this.quill.format("image", false)
      );
      toolbar.addHandler("video", (value) =>
        value ? this.handleFileClick("video") : this.quill.format("image", false)
      );
      toolbar.addHandler("audio", (value) =>
        value ? this.handleFileClick("audio") : this.quill.format("image", false)
      );
    },
    // 上传图片点击事件
    handleFileClick(type) {
      console.log(type);
      if (type == "image") {
        let _that = this;
        console.log(this.currentValue);
        // console.log(Quill.getText()
        const fileInput = document.createElement("input");
        console.log(fileInput.value);
        fileInput.setAttribute("type", "file");
        fileInput.setAttribute("accept", "*");
        fileInput.addEventListener("change", () => {
          const file = fileInput.files[0];
          console.log(file);
          const reader = new FileReader();
          reader.readAsDataURL(file);
          reader.onload = (e) => {
            if (type == "image" && !this.handleBeforeUpload(file)) return;
            var range = _that.Quill.getSelection();
            _that.Quill.insertEmbed(range.index, "image", e.target.result);
            // const data = new FormData();
            // console.log(data);
            // data.append("file", file);
            // let r = new XMLHttpRequest();
            // console.log(fileUploadUrl);
            // console.log(file.filePath);
            // r.open("post", fileUploadUrl);
            // r.onloadend = () => {
            //   const res = JSON.parse(r.responseText);
            //   if (res.filePath) this.handleUploadSuccess(res.filePath, type);
            // };
            // r.send(data);
          };
        });
        fileInput.click();
      } else if (type == "video") {
        console.log(type);
        let _that = this;
        // 添加视频上传模块
        var input = document.createElement("input");
        input.setAttribute("type", "file");
        input.setAttribute("accept", "video/*");
        input.click();
        input.onchange = function () {
          var file = input.files[0];
          var video = window.URL.createObjectURL(file); // 插入富文本框
          var range = _that.Quill.getSelection();
          _that.Quill.insertEmbed(range.index, "video", video);
          console.log(file);
        };
      }
    },
    // 上传前校检格式和大小
    handleBeforeUpload(file) {
      console.log(file);
      // 校检文件大小
      if (this.fileSize) {
        const isLt = file.size / 1024 / 1024 < this.fileSize;
        if (!isLt) {
          console.log(`上传文件大小不能超过 ${this.fileSize} MB!`);
          return false;
        }
      }
      return true;
    },
    // 处理上传成功事件
    handleUploadSuccess(filePath, type) {
      // 获取富文本组件实例
      let quill = this.Quill;
      // 获取光标所在位置
      let length = quill.getSelection().index;
      // 文件路径地址
      let fileRemotePath = fileRemoteUrl + filePath;
      // 插入媒体
      quill.insertEmbed(length, type, fileRemotePath);
      // 调整光标到最后
      quill.setSelection(length + 1);
    },
  },
};
</script>

<style>
.editor,
.ql-toolbar {
  white-space: pre-wrap !important;
  line-height: normal !important;
}
.quill-img {
  display: none;
}

.ql-snow button.ql-audio {
  background-image: url("./audio.svg");
  background-repeat: no-repeat;
  background-position: center;
}

.ql-snow .ql-tooltip[data-mode="link"]::before {
  content: "请输入链接地址:";
}
.ql-snow .ql-tooltip.ql-editing a.ql-action::after {
  border-right: 0px;
  content: "保存";
  padding-right: 0px;
}

.ql-snow .ql-tooltip[data-mode="video"]::before {
  content: "请输入视频地址:";
}

.ql-snow .ql-picker.ql-size .ql-picker-label::before,
.ql-snow .ql-picker.ql-size .ql-picker-item::before {
  content: "14px";
}
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value="small"]::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value="small"]::before {
  content: "10px";
}
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value="large"]::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value="large"]::before {
  content: "18px";
}
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value="huge"]::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value="huge"]::before {
  content: "32px";
}

.ql-snow .ql-picker.ql-header .ql-picker-label::before,
.ql-snow .ql-picker.ql-header .ql-picker-item::before {
  content: "文本";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="1"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="1"]::before {
  content: "标题1";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="2"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="2"]::before {
  content: "标题2";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="3"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="3"]::before {
  content: "标题3";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="4"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="4"]::before {
  content: "标题4";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="5"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="5"]::before {
  content: "标题5";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="6"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="6"]::before {
  content: "标题6";
}

.ql-snow .ql-picker.ql-font .ql-picker-label::before,
.ql-snow .ql-picker.ql-font .ql-picker-item::before {
  content: "标准字体";
}
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="serif"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="serif"]::before {
  content: "衬线字体";
}
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="monospace"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="monospace"]::before {
  content: "等宽字体";
}
</style>
